Poll: Romney losing ground in swing states

President Obama is building his lead in Florida, Ohio and Virginia over Republican presidential nominee Mitt Romney, according to polls released Thursday.

A series of NBC/Wall Street Journal/Marist College polls released Thursday evening show Mr. Obama with identical leads of 49 percent to 44 percent in Florida and Virginia and 50-43 lead in Ohio, as he appears to be enjoying a bump in support following last week’s Democratic National Convention.

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The polls were conducted from last Sunday to Tuesday.

The Romney campaign has dismissed recent polls in the president’s favor as the temporary result of a post-convention “sugar high,” but the numbers could be a troubling sign for Mr. Romney, whom many analysts say is fighting an uphill battle and will have to win a majority of swing states including Florida and Ohio if he hopes to win the presidency.